The advantages of coupling NPs containing lipophilic cytotoxic drugs with MAbs followed by local delivery to the lungs include: direct delivery to lungs, prolonged residence time in the target tissue; continuous release of significant potent drug doses at tumor sites and better cytotoxic drug internalization in tumors allowing improved efficacy. The present invention concerns a delivery system administered to the lung by inhalation comprising a polymer-based nanoparticle; and a linker comprising a first portion non-covalently anchored to said nanoparticle, wherein at least part of said first portion comprises a hydrophobic/lipophilic segment embedded in said nanoparticle; and a second portion comprising a maleimide compound exposed at the outer surface of said nanoparticle. In accordance with one embodiment, the delivery system comprises one or more targeting agents, each covalently bound to said maleimide compound. In accordance with yet another embodiment, the delivery system comprises a drug. A specific example for a linker in accordance with the invention is octadecyl-4-(maleimideomethyl)cyclohexane-carboxylic amide (OMCCA).
将含有亲脂性细胞毒性药物的 NPs 与 MAbs 联用,然后局部输送到肺部的优点包括:直接输送到肺部,延长在靶组织中的停留时间;在肿瘤部位持续释放大量强效药物,以及细胞毒性药物在肿瘤中更好的内化,从而提高疗效。本发明涉及一种通过吸入给药到肺部的给药系统,该系统包括聚合物基纳米粒子;以及连接剂,该连接剂包括非共价锚定到所述纳米粒子上的第一部分,其中所述第一部分的至少一部分包括嵌入所述纳米粒子的疏
水/亲油段;以及第二部分,该第二部分包括暴露在所述纳米粒子外表面的马来
酰亚胺化合物。根据一个实施方案,所述递送系统包括一种或多种靶向剂,每种靶向剂都与所述马来
酰亚胺化合物共价结合。根据另一个实施方案,所述递送系统包括药物。根据本发明,连接剂的一个具体例子是
十八烷基-4-(马来
酰亚胺甲基)
环己烷羧酰胺(OMCCA)。